X = int(input())
if X > 29:
   print('Yes')
else:
   print('No') X = int(input()) X int(input()) int input() input if X > 29:
   print('Yes')
else:
   print('No') X > 29 X 29 print('Yes') print 'Yes' print('No') print 'No' X = int(input()) int(input()) X
X = int(input())
if X > 29:
   print('Yes')
else:
   print('No')